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J. G. MILLER.

DRIP THOUGH FOR CENTRAL DRAFT LAMPS.

No. 566,208. PatentedAug. 18, 1896.

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I FFICE,

ATENT JOHN C. MILLER, OF IVATERBURY, CONNECTICUT, ASSIGNOR TO THE MAT- THEIVS dz IVILLARD MANUFACTURING COMPANY, OF SAME PLACE.

DRlP-TROUGH FOR CENTRAL-DRAFT LAMPS.

SPECIFICATION forming part of Letters Patent No. 566,208, dated August 18, 1896.

Application filed November 25, 1895. Serial No, 570,072- No modeL) To all whom it may concern:

Be it known that I, J OHN O. MILLER, of \Vaterbury, in the county of New Haven and State of Connecticut, have invented a new Improvement in Drip-Troughs for Central- Draft Lamps; and I do hereby declare the following, when taken in connection with the accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this specification, and represent, in-

Figure 1, a view, partlyin section and partly in elevation, of one form which my improvement may assume; Fig. 2, a broken view, in side elevation, of the upper end of the drafttube 5 Fig. 3, a view, partly in elevation and partly in vertical central section, of the driptrough.

My invention relates to an improvement in drip-troughs for central-draft lamps, the object being to prevent lamps of the type described from weeping, as the term is, by the use of a simple and conveniently-constructed and effective trough.

WVith these ends in view my invention consists of an annular U-shaped trough, adapted to have an air-distributer set into its open upper end, having its lower end perforated, and adapted to be applied to the upper end of the draft-tube of a central-draft lamp.

My invention further consists in certain details of construction and combinations, as will be hereinafter described, and point-ed out in the claims.

In carrying out my invention I construct an annular U-shaped trough A, having its upper end open, and perforations a. formed in its lower end and opening downward and outward. In exterior diameter it is designed to correspond to the exterior diameter of the central draft-tube B of the lamp, while its interior diameter is designed to correspond to the exterior diameter of a neck B, formed by reducing the upper end of the said drafttube, as clearly shown in Fig. 2. The annular shoulder B formed in the draft-tube by reducing the same to form the neck 13 corresponds in depth to the thickness of the trough. Under this construction it will be seen that the exterior surface of the trough will be coincident with the exterior surface of the draft-tube, of which it virtually forms a continuation, so that the presence of the trough in no way disturbs the feeding or ad- 5 5 justment of the wick, which is not shown.

As herein shown, the upper edge of the inner Wall of the trough is turned inward to form a flange a, which extends over the up per edge of the neck B to form a joint there, but this construction is not imperative. The annular chamber A contained by the trough is adapted to receive the lower end of the perforated air-distributer C, which may be of any desired construction. Thisannularchamber forms a free passage between the inner face of the distributer and the perforations a, formed in the lower end of the trough. The outer face of the lower end of the distributer comes into close contact, it will be observed, with the inner face of the outer wall of the trough, as clearly shown in Fig. 1.

It will be readily understood that the oil, which follows, by capillary action or otherwise, down along the lower end of the airdistributer, will enter the trough and be discharged into the wick, which will absorb it, through the perforations a of the trough. None of this oil being allowed to enter the inside of the draft-tube B or the neck B thereof, the weeping of oil through the middle of the tube is avoided.

By employing an annular U shaped trough, as described, it is immaterial whether or not the upper end of the tube is cracked or fissured in the process of drawing it to reduce it in diameter, as often occurs in reducing tubing in this manner, for under my invention I do not rely upon the reduced upper end of the draft'tube to form any part of the trough itself or to have anything to do with the interception or retention of the oil of escapement.

Both the inner and outer walls, as well as the bottom of the annular oil-chamber formed 9 5 by my improved trough, are entirely independent, it will be observed, of the central draft-tube.

It is apparent that in carrying out my invention some variations from the particular 10o construction shown and described may be made. Iwould therefore have it understood t that I do not limit myself to the particular construction set forth, but hold myself at liberty to make such variations therefrom as fairly fall within the spirit and scope of my invention.

I am aware, however, that it is old to reduce the upper end of the draft-tube of a central-draft lamp for the purpose of applying thereto an annular band coacting with the said end of the tube to form a driptrough. I am further aware that it is old to form an annular drip-trough and to set the lower end of an air-distributor into it. I do not, therefore, claim either of these constructions broadly.

Having fully described my invention what I claim as new, and desire to secure by Letters Patent, is

1. An annular U -shaped drip-trough having its inner and outer walls and bottom formed entirely independent of the central drafttube to which it is applied, adapted at its upper end to receive an air-distributer, and having its lower end perforated for the discharge of the oil intercepted by it.

2. In a central-draft lamp, the combination with a draft-tube having its upper end reduced in diameter to form a neck, of an an.-

nular U-shaped drip-trough having its inner and outer walls and bottom made entirely independent of the said draft-tube, adapted in internal diameter to fit over the neck thereof, constructed at its upper end to receive an air-distributer, and having its lower portion perforated for the discharge of the oil intercepted by it.

3. In a cen tral-d raft lamp, the combination with a draft-tube having its upper end reduced in diameter to form a neck, of an annular U -shaped drip-trough, having its inner and outer walls and bottom made entirely independent of the said tube, adapted to fit over the neck thereof, constructed at its up per end to receive an air-distributer, having perforations formed in it for the escape of the oil intercepted by it, and having the upper edge of its inner wall turned inward over the upper edge of the neck of the draft-tube, substantially as described.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

JOHN C. MILLER.

WVitnesses:

TRUMAN A. WARREN, ROBERT F. GRIGGS. 

